海泡石抑制作物镉的试验研究

海泡石作为一种天然物材料,用作治理土壤镉污染的抑制剂有其充足理论依据。试验研究表明:海泡石粘土粉对镉的吸附量大且不易解吸释放,这预示着用海泡石治理镉污染土壤效果会明显;海泡石粘土矿粉的加入使土壤中可溶态镉及植物的镉都显著降低,且随加入多,降低也多,同时生物量明显提高;海泡石粘土矿粉可以抑制镉的活性并降低植物中镉的含量,增产效果显著且明显优于石灰。因此,海泡石粘土矿粉不仅可作为土壤镉的抑制剂,而且可作为植物的增效肥来施用,开发前景广阔。

Experimental Study of Inhibited Cadmium by Sepiolite in Crop

Sepiolite, a natural material, used as an inhibitor for the soil pollution caused by cadmium, has adequate theoretical basis. Experiments show that： sepiolite clay powder has great adsorption for cadmium and difficult to absorb, which means that the treatment effect on cadmium contaminated soil with sepiolite will be obvious. The addition of sepiolite clay powder makes the soluble cadmium in soil and the cadmium in plants decrease. As the ad- dition increasing, the amount of cadmium reduces much more, while the biomass increase obviously. The yield in- crease more obviously than slaked lime for sepiolite clay powder can inhibit the activity of cadmium and reduce the cadmium amount in plants. Therefore, sepiohte clay powder not only can be used as an inhibitor of soil cadmium, but also used as a fertilizer of plant, of which the development prospect is broad.